absent after sale support

I bought a Rizzen X700 battery power station from them for R6kplus, which arrived faulty I sent several messages, logged in a return, complaint and did all I could to have an exchange or refund, no one ever came back to me. The fact that there is no phone contact makes it even worse. I had previously orders some stuff where I was not super happy but this time I am overly disappointed. They promise to get back within 2 hours of receiving a contact on their HELP Centre form, but nothing ever happens. They get the money and dissapper, At the end I had to find the distributer of the power station to solicit help from them.